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// Other services

Port 2542: uDraw(Graph)

Port 2542 is assigned by IANA to udrawgraph (uDraw(Graph)).

2542

How udrawgraph works

Other services
client:2542udrawgraphresponse client:2542udrawgraphresponse

The client sends a request to port 2542 and the udrawgraph service answers.

Transport
TCP · UDP
Exposure risk
not rated depends on the program listening
Encryption
Unknownnot stated by the registry
IANA status
Assigned1 registered service
Range
Registered (1024-49151)
Category
Other services
01 Security

Is port 2542 dangerous?

We have no specific security note for port 2542. Its risk depends on the program actually listening on it. General advice for other services services:

  • Close the port if nothing on the host needs it.
  • Identify the process that listens on it (commands below) before opening it in a firewall.
  • Expose a service only to the networks that use it.
02 Registry

IANA registry entries for port 2542

ServicePortTransportDescriptionReferenceUpdated
udrawgraph 2542 TCP, UDP uDraw(Graph) - -

// source: IANA service name and port number registry

03 Check it

Which program uses port 2542, and is it reachable?

Linux

sudo ss -ltnup 'sport = :2542'      # process listening on 2542
sudo lsof -nP -i :2542

macOS

sudo lsof -nP -i :2542

Windows (PowerShell)

Get-NetTCPConnection -LocalPort 2542 -State Listen | Select LocalAddress, OwningProcess
Get-NetUDPEndpoint -LocalPort 2542
netstat -ano | findstr :2542

From another machine

nmap -p 2542 -sV <host>
sudo nmap -sU -p 2542 <host>
nc -zv <host> 2542

Block it in the firewall

sudo ufw deny 2542/tcp                                         # Linux (ufw)
New-NetFirewallRule -DisplayName "Block 2542" -Direction Inbound -LocalPort 2542 -Protocol TCP -Action Block  # Windows
04 FAQ
What is port 2542 used for?

Port 2542 is assigned by IANA to udrawgraph (uDraw(Graph)).

Is port 2542 TCP or UDP?

Port 2542 is registered for TCP and UDP.

Is it safe to open port 2542?

It depends on the program that listens on it. Open it only for a service you know and only to the networks that need it. Close the port if nothing on the host needs it.

How do I check if port 2542 is open?

On Linux run "ss -ltnup 'sport = :2542'", on macOS "lsof -nP -i :2542", and on Windows "netstat -ano | findstr :2542" to see the local process. From another machine, "nmap -p 2542 <host>" shows whether it is reachable.

05 Related
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